The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform

L H Allen - One of the best experts on this subject based on the ideXlab platform.

  • size dependent Melting Point depression of nanostructures nanocalorimetric measurements
    Physical Review B, 2000
    Co-Authors: M Zhang, Yu M Efremov, F Schiettekatte, E A Olson, A T Kwan, T Wisleder, J E Greene, L H Allen
    Abstract:

    The Melting behavior of 0.1\char21{}10-nm-thick discontinuous indium films formed by evaporation on amorphous silicon nitride is investigated by an ultrasensitive thin-film scanning calorimetry technique. The films consist of ensembles of nanostructures for which the size dependence of the Melting temperature and latent heat of fusion are determined. The relationship between the nanostructure radius and the corresponding Melting Point and latent heat is deduced solely from experimental results (i.e., with no assumed model) by comparing the calorimetric measurements to the particle size distributions obtained by transmission electron microscopy. It is shown that the Melting Point of the investigated indium nanostructures decreases as much as 110 K for particles with a radius of 2 nm. The experimental results are discussed in terms of existing Melting Point depression models. Excellent agreement with the homogeneous Melting model is observed.

Chen Wenxing - One of the best experts on this subject based on the ideXlab platform.

  • Study on Rheological Behavior of Low Melting Point Copolyester
    Synthetic Fiber in China, 2008
    Co-Authors: Chen Wenxing
    Abstract:

    The low Melting Point copolyester was synthesized by the copolycondensation of PTA,IPA,BDO.The rheological behaviors of the low Melting Point copolyester were studied with Rosand RH7 capillary rheometer.The result showed that the low Melting Point copolyester was a tipical pseudoplastic fluids,the shear viscosity of copolyester declined and the non-Newton index increased with the increasing of temperature.The visco-flow activition energy declined with the increasing of shear rate.Comparing with the two different composition copolyesters,it was found that the shear viscosity and non-Newton index of copolyesters decreasd with increasing of third monomer IPA.The fluences of the third monomer on rheological behavior of low Melting Point copolyester was investigated.

Sinopec Beijing - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis and properties of low-Melting Point copolyester
    China Synthetic Fiber Industry, 2006
    Co-Authors: Sinopec Beijing
    Abstract:

    The synthesis process and properties of low-Melting Point copolyester for fiber spinning were introduced. The Melting Point of polyester was decreased by changing the components. The result showed that the Melting Point was decreased linearly in some range with the addition of the third component containing dihydroxy-terminated monomer. The obtained copolymer had the Melting Point of 128℃ and showed a certain crystallinity and good spinnability when the molar ratio of butanediol, the fourth component , was 40% based on the total alcohol addition. The properties of the copolyester chips and fibers were characterized by DSC, X-ray diffraction and IR spectroscopy, etc. The results showed that the methylene content was increased in copolyesters, which raised the Melting Point and contributed a certain crystallinity to the obtained copolyester.

M Zhang - One of the best experts on this subject based on the ideXlab platform.

  • size dependent Melting Point depression of nanostructures nanocalorimetric measurements
    Physical Review B, 2000
    Co-Authors: M Zhang, Yu M Efremov, F Schiettekatte, E A Olson, A T Kwan, T Wisleder, J E Greene, L H Allen
    Abstract:

    The Melting behavior of 0.1\char21{}10-nm-thick discontinuous indium films formed by evaporation on amorphous silicon nitride is investigated by an ultrasensitive thin-film scanning calorimetry technique. The films consist of ensembles of nanostructures for which the size dependence of the Melting temperature and latent heat of fusion are determined. The relationship between the nanostructure radius and the corresponding Melting Point and latent heat is deduced solely from experimental results (i.e., with no assumed model) by comparing the calorimetric measurements to the particle size distributions obtained by transmission electron microscopy. It is shown that the Melting Point of the investigated indium nanostructures decreases as much as 110 K for particles with a radius of 2 nm. The experimental results are discussed in terms of existing Melting Point depression models. Excellent agreement with the homogeneous Melting model is observed.

Qin Wei-ming - One of the best experts on this subject based on the ideXlab platform.

  • Thermal Analysis on the Low Melting Point Polyester
    Journal of Zhejiang Institute of Science and Technology, 2005
    Co-Authors: Qin Wei-ming
    Abstract:

    A series of modified PET samples and these PET samples after precrystallizing are analyzed by means of DSC. The effects of different modified compositions on the property of the co-PET, such as glass transition temperature, crystallization and so on, are discussed. So the results of these modified compositions on the low Melting Point polyester can be got. Some optimum processing parameters about manufacturing the low Melting Point polyester can also be obtained.